Answer Happy

Part 1. Torque. 1. A uniform rod of length / and mass M is attached at one end to a frictionless pivot and is free to rotate about the pivot in the vertical plane, as shown in the figure to the right. The rod is released from rest in the horizontal position. Calculate: (a) the initial torque acting on the rod; (b) the initial angular acceleration of the rod; (c) the initial linear (tangential) acceleration of its right end; (d) the torque acting on the rod after it swings down by 45°. (Hint: is the torque constant?) CM SN Fg